Holder for electric glow-lamps.



. C. A. SCHAEFER.

HOLDER r011 ELECTRIC GLOW LAMPS. APYYLIOATI'ON FILED APREIO, 1914.

1 33 Patented Dec. 15. 191

WZ/YZSSZS inf/W06 it also makes a lat CARL AUGUST SCHAEFER, OF HANOVER.GERMANY.

.,HOLDER.FOB ELECTRIC GLOW-LAMPS.

Specification of Letters-Patent. Patented Dec, 15, 19 14,

* Application filed April 30. 1914. Serial No. 835.506.

Ta all whom t may concern Be it known that I, CARL AUGUST SOHAE- FER, acitizen of the German Empire, residing at Hanover, in the German Empire,have -invented-certain new and useful Improve ments in Holders forElectric Glow-Lamps, of which the following is as 'iecification.

The object of this invention is'to provide a holder, for electric glowhf'ips, having means whereby glow lamps of il'iti'erent sizes can beconveniently fixed therein in the most favorable position. for givinglight.

The invention illustrated in the accompanying drawing, showing anembodiment thereof, Figures 1 and :2 being two vertical sections, Fig. 1showing the holder fixed, and Fig. 2 showing same released for purposesof adjustment.

The appliance shown in the di. wings comprises a cover or bell oinclosing a frame comprising two rods or pillars a top flange 0, and aconnecting tube or hanger The rods 6 serve as guides for a bridge 6 toWhich the lamp holder or socket f is fixed. The holder can thus be movedby means of the bridge up and down the guides Z) inside the cover. Toenable the bridge to be fixed in any desired position, a rack bar 9having steps or notches is provided. Said bar has oblique parallel slotsit above and below the series of steps respectii ely, these slots beingengaged with studs fixed at the top to the flange 0, and at the bottomto the lamp shade k, so that when the bar moved up or down 11 movement.The bridge is provided with a tooth or nose 2' adapted to engage withthe steps on the bar 9. The stepped bar ii: L tendency to drop bygravity and in doin to approach the'tooth or nose i so that t iatterbecomes engaged with one of the s. s. To enable the bridge e and holderto be adplsted at a selected height the stepped in: r is pushed up, andthus disengaged from the tooth or nose; then the holder is moved to thedesired position.

In the drawing the lamp shown in solid lines is a long necked lamp andfor holding this lamp the bridge is pushed comparatively high up; For aslant necl-red lamp the bridge is fixed lower donv ii, as indicated bybroken lines in Fig. 1, so that in each case the focal point is thesame. Fig. 2 shows the adjusting device in its disengaged position; itwill be seen that the bridge can now be freely moved.

To enable a lamp to be correctly adjusted the followinggnanipulation isthe most practicable: Upward pressure on the stepped bar releases theadjusting device, and the without having to hold the stepped bar in itselevated position. The stepped bar is pushed up by means of a pushbutton Z working in a hole in the reflector m.

For unscrewing the lamp from its socket it of ad antage to let theholder right down, and the lamp can then be held byit: neck, immediatelybelow the screw contact, instead of by the bulb. Moreover, when theholder is in its lowest position the connections of the supply wires canbe inspected.

in moving the holder the supply wires. which are exposed between theholder and the tube may be liable to toul the rods, and hinder themovement. In order to prevent this, one of the guide rods, preferablythe one opposite the stepped. bar. may be embraced by an insulating ringthrough which the Wires are threaded, said ring moving with the holder.

What I claim as m invention and desire to see e by Letters atent of theUnited States is 1. In an appliance for the purpose set forth, thecombination of a movable glow lamp holder, means for guiding saidholder, a tooth connected to said holder, a movable member alongsidesaid guiding means, having a, series of notches adapted to engage saidtooth, and guiding means for said toothed member, enabling same toapproach and recede from the path of said holder.

in an appliance for the purpose set forth the combination of a pillar, amember slidably engaged with said pillar. a lamp socket fixed tosaidslidable member, a tooth fixed to said slidable member, a movablerack bar parallel with said pillar adapted to engage said tooth, andmeans obliquely guiding said rack bar, whereby the sam recedes from saidpillar when performing a lengthwise movement in one direction.

3. In an appliance for the purpose set forth the combination of amovable glow lamp holder, a vertical guide for said holder, a toothconnected to said holder, a movable rack bar parallel with said guide,adapted to enga e said tooth and having obli ue slots, an studs engagingsaid slots. where p y said rack bar is caused torecede from said toothwhen moved upward.

4. In an apgliance for the purpose set forth the com ination of amovable glow lamp holder, a vertical guide for said ho der, a toothconnected to sald holder, a movable rack bar parallel with said guide.adapted to engage said tooth and having obhque slots, and studs engagingsaid slots, whereby said raek bar is caused to recede from said toothwhen moved u ward, said rack bar having teeth with orizontal upperfaces.

5. In an apgliance for the purpose set forth the com ination of amovable glow lamp holder, 9. vertical guide for said holder, a toothconnected to sa1d h lder, a movable rack bar parallel with sai guide,adalpted to engage said tooth and having ob ue slots, studs engagingsaid slots, where y said rack bar is caused to recede from said toothwhen moved upward, a lamp reflector under said holder, and a pushmounted in said reflector, engaging the bottom end of said rack bar.

In witness whereof I have signed this specification in the presence oftwo witnesses CARL AUGUST SCHAEFER. WitnAassIe s: IEHMEYER, T. HENRYRam).

